KVM: PPC: Implement MMU notifiers for Book3S HV guests
[linux-2.6.git] / arch / powerpc / kvm / powerpc.c
1 /*
2  * This program is free software; you can redistribute it and/or modify
3  * it under the terms of the GNU General Public License, version 2, as
4  * published by the Free Software Foundation.
5  *
6  * This program is distributed in the hope that it will be useful,
7  * but WITHOUT ANY WARRANTY; without even the implied warranty of
8  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
9  * GNU General Public License for more details.
10  *
11  * You should have received a copy of the GNU General Public License
12  * along with this program; if not, write to the Free Software
13  * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
14  *
15  * Copyright IBM Corp. 2007
16  *
17  * Authors: Hollis Blanchard <hollisb@us.ibm.com>
18  *          Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
19  */
20
21 #include <linux/errno.h>
22 #include <linux/err.h>
23 #include <linux/kvm_host.h>
24 #include <linux/vmalloc.h>
25 #include <linux/hrtimer.h>
26 #include <linux/fs.h>
27 #include <linux/slab.h>
28 #include <asm/cputable.h>
29 #include <asm/uaccess.h>
30 #include <asm/kvm_ppc.h>
31 #include <asm/tlbflush.h>
32 #include <asm/cputhreads.h>
33 #include "timing.h"
34 #include "../mm/mmu_decl.h"
35
36 #define CREATE_TRACE_POINTS
37 #include "trace.h"
38
39 int kvm_arch_vcpu_runnable(struct kvm_vcpu *v)
40 {
41         return !(v->arch.shared->msr & MSR_WE) ||
42                !!(v->arch.pending_exceptions) ||
43                v->requests;
44 }
45
46 int kvmppc_kvm_pv(struct kvm_vcpu *vcpu)
47 {
48         int nr = kvmppc_get_gpr(vcpu, 11);
49         int r;
50         unsigned long __maybe_unused param1 = kvmppc_get_gpr(vcpu, 3);
51         unsigned long __maybe_unused param2 = kvmppc_get_gpr(vcpu, 4);
52         unsigned long __maybe_unused param3 = kvmppc_get_gpr(vcpu, 5);
53         unsigned long __maybe_unused param4 = kvmppc_get_gpr(vcpu, 6);
54         unsigned long r2 = 0;
55
56         if (!(vcpu->arch.shared->msr & MSR_SF)) {
57                 /* 32 bit mode */
58                 param1 &= 0xffffffff;
59                 param2 &= 0xffffffff;
60                 param3 &= 0xffffffff;
61                 param4 &= 0xffffffff;
62         }
63
64         switch (nr) {
65         case HC_VENDOR_KVM | KVM_HC_PPC_MAP_MAGIC_PAGE:
66         {
67                 vcpu->arch.magic_page_pa = param1;
68                 vcpu->arch.magic_page_ea = param2;
69
70                 r2 = KVM_MAGIC_FEAT_SR | KVM_MAGIC_FEAT_MAS0_TO_SPRG7;
71
72                 r = HC_EV_SUCCESS;
73                 break;
74         }
75         case HC_VENDOR_KVM | KVM_HC_FEATURES:
76                 r = HC_EV_SUCCESS;
77 #if defined(CONFIG_PPC_BOOK3S) || defined(CONFIG_KVM_E500)
78                 /* XXX Missing magic page on 44x */
79                 r2 |= (1 << KVM_FEATURE_MAGIC_PAGE);
80 #endif
81
82                 /* Second return value is in r4 */
83                 break;
84         default:
85                 r = HC_EV_UNIMPLEMENTED;
86                 break;
87         }
88
89         kvmppc_set_gpr(vcpu, 4, r2);
90
91         return r;
92 }
93
94 int kvmppc_sanity_check(struct kvm_vcpu *vcpu)
95 {
96         int r = false;
97
98         /* We have to know what CPU to virtualize */
99         if (!vcpu->arch.pvr)
100                 goto out;
101
102         /* PAPR only works with book3s_64 */
103         if ((vcpu->arch.cpu_type != KVM_CPU_3S_64) && vcpu->arch.papr_enabled)
104                 goto out;
105
106 #ifdef CONFIG_KVM_BOOK3S_64_HV
107         /* HV KVM can only do PAPR mode for now */
108         if (!vcpu->arch.papr_enabled)
109                 goto out;
110 #endif
111
112         r = true;
113
114 out:
115         vcpu->arch.sane = r;
116         return r ? 0 : -EINVAL;
117 }
118
119 int kvmppc_emulate_mmio(struct kvm_run *run, struct kvm_vcpu *vcpu)
120 {
121         enum emulation_result er;
122         int r;
123
124         er = kvmppc_emulate_instruction(run, vcpu);
125         switch (er) {
126         case EMULATE_DONE:
127                 /* Future optimization: only reload non-volatiles if they were
128                  * actually modified. */
129                 r = RESUME_GUEST_NV;
130                 break;
131         case EMULATE_DO_MMIO:
132                 run->exit_reason = KVM_EXIT_MMIO;
133                 /* We must reload nonvolatiles because "update" load/store
134                  * instructions modify register state. */
135                 /* Future optimization: only reload non-volatiles if they were
136                  * actually modified. */
137                 r = RESUME_HOST_NV;
138                 break;
139         case EMULATE_FAIL:
140                 /* XXX Deliver Program interrupt to guest. */
141                 printk(KERN_EMERG "%s: emulation failed (%08x)\n", __func__,
142                        kvmppc_get_last_inst(vcpu));
143                 r = RESUME_HOST;
144                 break;
145         default:
146                 BUG();
147         }
148
149         return r;
150 }
151
152 int kvm_arch_hardware_enable(void *garbage)
153 {
154         return 0;
155 }
156
157 void kvm_arch_hardware_disable(void *garbage)
158 {
159 }
160
161 int kvm_arch_hardware_setup(void)
162 {
163         return 0;
164 }
165
166 void kvm_arch_hardware_unsetup(void)
167 {
168 }
169
170 void kvm_arch_check_processor_compat(void *rtn)
171 {
172         *(int *)rtn = kvmppc_core_check_processor_compat();
173 }
174
175 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
176 {
177         if (type)
178                 return -EINVAL;
179
180         return kvmppc_core_init_vm(kvm);
181 }
182
183 void kvm_arch_destroy_vm(struct kvm *kvm)
184 {
185         unsigned int i;
186         struct kvm_vcpu *vcpu;
187
188         kvm_for_each_vcpu(i, vcpu, kvm)
189                 kvm_arch_vcpu_free(vcpu);
190
191         mutex_lock(&kvm->lock);
192         for (i = 0; i < atomic_read(&kvm->online_vcpus); i++)
193                 kvm->vcpus[i] = NULL;
194
195         atomic_set(&kvm->online_vcpus, 0);
196
197         kvmppc_core_destroy_vm(kvm);
198
199         mutex_unlock(&kvm->lock);
200 }
201
202 void kvm_arch_sync_events(struct kvm *kvm)
203 {
204 }
205
206 int kvm_dev_ioctl_check_extension(long ext)
207 {
208         int r;
209
210         switch (ext) {
211 #ifdef CONFIG_BOOKE
212         case KVM_CAP_PPC_BOOKE_SREGS:
213 #else
214         case KVM_CAP_PPC_SEGSTATE:
215         case KVM_CAP_PPC_PAPR:
216 #endif
217         case KVM_CAP_PPC_UNSET_IRQ:
218         case KVM_CAP_PPC_IRQ_LEVEL:
219         case KVM_CAP_ENABLE_CAP:
220                 r = 1;
221                 break;
222 #ifndef CONFIG_KVM_BOOK3S_64_HV
223         case KVM_CAP_PPC_PAIRED_SINGLES:
224         case KVM_CAP_PPC_OSI:
225         case KVM_CAP_PPC_GET_PVINFO:
226 #ifdef CONFIG_KVM_E500
227         case KVM_CAP_SW_TLB:
228 #endif
229                 r = 1;
230                 break;
231         case KVM_CAP_COALESCED_MMIO:
232                 r = KVM_COALESCED_MMIO_PAGE_OFFSET;
233                 break;
234 #endif
235 #ifdef CONFIG_KVM_BOOK3S_64_HV
236         case KVM_CAP_SPAPR_TCE:
237                 r = 1;
238                 break;
239         case KVM_CAP_PPC_SMT:
240                 r = threads_per_core;
241                 break;
242         case KVM_CAP_PPC_RMA:
243                 r = 1;
244                 /* PPC970 requires an RMA */
245                 if (cpu_has_feature(CPU_FTR_ARCH_201))
246                         r = 2;
247                 break;
248         case KVM_CAP_SYNC_MMU:
249                 r = cpu_has_feature(CPU_FTR_ARCH_206) ? 1 : 0;
250                 break;
251 #endif
252         default:
253                 r = 0;
254                 break;
255         }
256         return r;
257
258 }
259
260 long kvm_arch_dev_ioctl(struct file *filp,
261                         unsigned int ioctl, unsigned long arg)
262 {
263         return -EINVAL;
264 }
265
266 int kvm_arch_prepare_memory_region(struct kvm *kvm,
267                                    struct kvm_memory_slot *memslot,
268                                    struct kvm_memory_slot old,
269                                    struct kvm_userspace_memory_region *mem,
270                                    int user_alloc)
271 {
272         return kvmppc_core_prepare_memory_region(kvm, mem);
273 }
274
275 void kvm_arch_commit_memory_region(struct kvm *kvm,
276                struct kvm_userspace_memory_region *mem,
277                struct kvm_memory_slot old,
278                int user_alloc)
279 {
280         kvmppc_core_commit_memory_region(kvm, mem);
281 }
282
283
284 void kvm_arch_flush_shadow(struct kvm *kvm)
285 {
286 }
287
288 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id)
289 {
290         struct kvm_vcpu *vcpu;
291         vcpu = kvmppc_core_vcpu_create(kvm, id);
292         vcpu->arch.wqp = &vcpu->wq;
293         if (!IS_ERR(vcpu))
294                 kvmppc_create_vcpu_debugfs(vcpu, id);
295         return vcpu;
296 }
297
298 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
299 {
300         /* Make sure we're not using the vcpu anymore */
301         hrtimer_cancel(&vcpu->arch.dec_timer);
302         tasklet_kill(&vcpu->arch.tasklet);
303
304         kvmppc_remove_vcpu_debugfs(vcpu);
305         kvmppc_core_vcpu_free(vcpu);
306 }
307
308 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
309 {
310         kvm_arch_vcpu_free(vcpu);
311 }
312
313 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
314 {
315         return kvmppc_core_pending_dec(vcpu);
316 }
317
318 /*
319  * low level hrtimer wake routine. Because this runs in hardirq context
320  * we schedule a tasklet to do the real work.
321  */
322 enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer)
323 {
324         struct kvm_vcpu *vcpu;
325
326         vcpu = container_of(timer, struct kvm_vcpu, arch.dec_timer);
327         tasklet_schedule(&vcpu->arch.tasklet);
328
329         return HRTIMER_NORESTART;
330 }
331
332 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
333 {
334         hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
335         tasklet_init(&vcpu->arch.tasklet, kvmppc_decrementer_func, (ulong)vcpu);
336         vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup;
337         vcpu->arch.dec_expires = ~(u64)0;
338
339 #ifdef CONFIG_KVM_EXIT_TIMING
340         mutex_init(&vcpu->arch.exit_timing_lock);
341 #endif
342
343         return 0;
344 }
345
346 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
347 {
348         kvmppc_mmu_destroy(vcpu);
349 }
350
351 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
352 {
353 #ifdef CONFIG_BOOKE
354         /*
355          * vrsave (formerly usprg0) isn't used by Linux, but may
356          * be used by the guest.
357          *
358          * On non-booke this is associated with Altivec and
359          * is handled by code in book3s.c.
360          */
361         mtspr(SPRN_VRSAVE, vcpu->arch.vrsave);
362 #endif
363         kvmppc_core_vcpu_load(vcpu, cpu);
364         vcpu->cpu = smp_processor_id();
365 }
366
367 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
368 {
369         kvmppc_core_vcpu_put(vcpu);
370 #ifdef CONFIG_BOOKE
371         vcpu->arch.vrsave = mfspr(SPRN_VRSAVE);
372 #endif
373         vcpu->cpu = -1;
374 }
375
376 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
377                                         struct kvm_guest_debug *dbg)
378 {
379         return -EINVAL;
380 }
381
382 static void kvmppc_complete_dcr_load(struct kvm_vcpu *vcpu,
383                                      struct kvm_run *run)
384 {
385         kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, run->dcr.data);
386 }
387
388 static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
389                                       struct kvm_run *run)
390 {
391         u64 uninitialized_var(gpr);
392
393         if (run->mmio.len > sizeof(gpr)) {
394                 printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len);
395                 return;
396         }
397
398         if (vcpu->arch.mmio_is_bigendian) {
399                 switch (run->mmio.len) {
400                 case 8: gpr = *(u64 *)run->mmio.data; break;
401                 case 4: gpr = *(u32 *)run->mmio.data; break;
402                 case 2: gpr = *(u16 *)run->mmio.data; break;
403                 case 1: gpr = *(u8 *)run->mmio.data; break;
404                 }
405         } else {
406                 /* Convert BE data from userland back to LE. */
407                 switch (run->mmio.len) {
408                 case 4: gpr = ld_le32((u32 *)run->mmio.data); break;
409                 case 2: gpr = ld_le16((u16 *)run->mmio.data); break;
410                 case 1: gpr = *(u8 *)run->mmio.data; break;
411                 }
412         }
413
414         if (vcpu->arch.mmio_sign_extend) {
415                 switch (run->mmio.len) {
416 #ifdef CONFIG_PPC64
417                 case 4:
418                         gpr = (s64)(s32)gpr;
419                         break;
420 #endif
421                 case 2:
422                         gpr = (s64)(s16)gpr;
423                         break;
424                 case 1:
425                         gpr = (s64)(s8)gpr;
426                         break;
427                 }
428         }
429
430         kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
431
432         switch (vcpu->arch.io_gpr & KVM_REG_EXT_MASK) {
433         case KVM_REG_GPR:
434                 kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
435                 break;
436         case KVM_REG_FPR:
437                 vcpu->arch.fpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
438                 break;
439 #ifdef CONFIG_PPC_BOOK3S
440         case KVM_REG_QPR:
441                 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
442                 break;
443         case KVM_REG_FQPR:
444                 vcpu->arch.fpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
445                 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
446                 break;
447 #endif
448         default:
449                 BUG();
450         }
451 }
452
453 int kvmppc_handle_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
454                        unsigned int rt, unsigned int bytes, int is_bigendian)
455 {
456         if (bytes > sizeof(run->mmio.data)) {
457                 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
458                        run->mmio.len);
459         }
460
461         run->mmio.phys_addr = vcpu->arch.paddr_accessed;
462         run->mmio.len = bytes;
463         run->mmio.is_write = 0;
464
465         vcpu->arch.io_gpr = rt;
466         vcpu->arch.mmio_is_bigendian = is_bigendian;
467         vcpu->mmio_needed = 1;
468         vcpu->mmio_is_write = 0;
469         vcpu->arch.mmio_sign_extend = 0;
470
471         return EMULATE_DO_MMIO;
472 }
473
474 /* Same as above, but sign extends */
475 int kvmppc_handle_loads(struct kvm_run *run, struct kvm_vcpu *vcpu,
476                         unsigned int rt, unsigned int bytes, int is_bigendian)
477 {
478         int r;
479
480         r = kvmppc_handle_load(run, vcpu, rt, bytes, is_bigendian);
481         vcpu->arch.mmio_sign_extend = 1;
482
483         return r;
484 }
485
486 int kvmppc_handle_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
487                         u64 val, unsigned int bytes, int is_bigendian)
488 {
489         void *data = run->mmio.data;
490
491         if (bytes > sizeof(run->mmio.data)) {
492                 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
493                        run->mmio.len);
494         }
495
496         run->mmio.phys_addr = vcpu->arch.paddr_accessed;
497         run->mmio.len = bytes;
498         run->mmio.is_write = 1;
499         vcpu->mmio_needed = 1;
500         vcpu->mmio_is_write = 1;
501
502         /* Store the value at the lowest bytes in 'data'. */
503         if (is_bigendian) {
504                 switch (bytes) {
505                 case 8: *(u64 *)data = val; break;
506                 case 4: *(u32 *)data = val; break;
507                 case 2: *(u16 *)data = val; break;
508                 case 1: *(u8  *)data = val; break;
509                 }
510         } else {
511                 /* Store LE value into 'data'. */
512                 switch (bytes) {
513                 case 4: st_le32(data, val); break;
514                 case 2: st_le16(data, val); break;
515                 case 1: *(u8 *)data = val; break;
516                 }
517         }
518
519         return EMULATE_DO_MMIO;
520 }
521
522 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
523 {
524         int r;
525         sigset_t sigsaved;
526
527         if (vcpu->sigset_active)
528                 sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
529
530         if (vcpu->mmio_needed) {
531                 if (!vcpu->mmio_is_write)
532                         kvmppc_complete_mmio_load(vcpu, run);
533                 vcpu->mmio_needed = 0;
534         } else if (vcpu->arch.dcr_needed) {
535                 if (!vcpu->arch.dcr_is_write)
536                         kvmppc_complete_dcr_load(vcpu, run);
537                 vcpu->arch.dcr_needed = 0;
538         } else if (vcpu->arch.osi_needed) {
539                 u64 *gprs = run->osi.gprs;
540                 int i;
541
542                 for (i = 0; i < 32; i++)
543                         kvmppc_set_gpr(vcpu, i, gprs[i]);
544                 vcpu->arch.osi_needed = 0;
545         } else if (vcpu->arch.hcall_needed) {
546                 int i;
547
548                 kvmppc_set_gpr(vcpu, 3, run->papr_hcall.ret);
549                 for (i = 0; i < 9; ++i)
550                         kvmppc_set_gpr(vcpu, 4 + i, run->papr_hcall.args[i]);
551                 vcpu->arch.hcall_needed = 0;
552         }
553
554         r = kvmppc_vcpu_run(run, vcpu);
555
556         if (vcpu->sigset_active)
557                 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
558
559         return r;
560 }
561
562 void kvm_vcpu_kick(struct kvm_vcpu *vcpu)
563 {
564         int me;
565         int cpu = vcpu->cpu;
566
567         me = get_cpu();
568         if (waitqueue_active(vcpu->arch.wqp)) {
569                 wake_up_interruptible(vcpu->arch.wqp);
570                 vcpu->stat.halt_wakeup++;
571         } else if (cpu != me && cpu != -1) {
572                 smp_send_reschedule(vcpu->cpu);
573         }
574         put_cpu();
575 }
576
577 int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq)
578 {
579         if (irq->irq == KVM_INTERRUPT_UNSET) {
580                 kvmppc_core_dequeue_external(vcpu, irq);
581                 return 0;
582         }
583
584         kvmppc_core_queue_external(vcpu, irq);
585         kvm_vcpu_kick(vcpu);
586
587         return 0;
588 }
589
590 static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
591                                      struct kvm_enable_cap *cap)
592 {
593         int r;
594
595         if (cap->flags)
596                 return -EINVAL;
597
598         switch (cap->cap) {
599         case KVM_CAP_PPC_OSI:
600                 r = 0;
601                 vcpu->arch.osi_enabled = true;
602                 break;
603         case KVM_CAP_PPC_PAPR:
604                 r = 0;
605                 vcpu->arch.papr_enabled = true;
606                 break;
607 #ifdef CONFIG_KVM_E500
608         case KVM_CAP_SW_TLB: {
609                 struct kvm_config_tlb cfg;
610                 void __user *user_ptr = (void __user *)(uintptr_t)cap->args[0];
611
612                 r = -EFAULT;
613                 if (copy_from_user(&cfg, user_ptr, sizeof(cfg)))
614                         break;
615
616                 r = kvm_vcpu_ioctl_config_tlb(vcpu, &cfg);
617                 break;
618         }
619 #endif
620         default:
621                 r = -EINVAL;
622                 break;
623         }
624
625         if (!r)
626                 r = kvmppc_sanity_check(vcpu);
627
628         return r;
629 }
630
631 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
632                                     struct kvm_mp_state *mp_state)
633 {
634         return -EINVAL;
635 }
636
637 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
638                                     struct kvm_mp_state *mp_state)
639 {
640         return -EINVAL;
641 }
642
643 long kvm_arch_vcpu_ioctl(struct file *filp,
644                          unsigned int ioctl, unsigned long arg)
645 {
646         struct kvm_vcpu *vcpu = filp->private_data;
647         void __user *argp = (void __user *)arg;
648         long r;
649
650         switch (ioctl) {
651         case KVM_INTERRUPT: {
652                 struct kvm_interrupt irq;
653                 r = -EFAULT;
654                 if (copy_from_user(&irq, argp, sizeof(irq)))
655                         goto out;
656                 r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
657                 goto out;
658         }
659
660         case KVM_ENABLE_CAP:
661         {
662                 struct kvm_enable_cap cap;
663                 r = -EFAULT;
664                 if (copy_from_user(&cap, argp, sizeof(cap)))
665                         goto out;
666                 r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap);
667                 break;
668         }
669
670 #ifdef CONFIG_KVM_E500
671         case KVM_DIRTY_TLB: {
672                 struct kvm_dirty_tlb dirty;
673                 r = -EFAULT;
674                 if (copy_from_user(&dirty, argp, sizeof(dirty)))
675                         goto out;
676                 r = kvm_vcpu_ioctl_dirty_tlb(vcpu, &dirty);
677                 break;
678         }
679 #endif
680
681         default:
682                 r = -EINVAL;
683         }
684
685 out:
686         return r;
687 }
688
689 int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf)
690 {
691         return VM_FAULT_SIGBUS;
692 }
693
694 static int kvm_vm_ioctl_get_pvinfo(struct kvm_ppc_pvinfo *pvinfo)
695 {
696         u32 inst_lis = 0x3c000000;
697         u32 inst_ori = 0x60000000;
698         u32 inst_nop = 0x60000000;
699         u32 inst_sc = 0x44000002;
700         u32 inst_imm_mask = 0xffff;
701
702         /*
703          * The hypercall to get into KVM from within guest context is as
704          * follows:
705          *
706          *    lis r0, r0, KVM_SC_MAGIC_R0@h
707          *    ori r0, KVM_SC_MAGIC_R0@l
708          *    sc
709          *    nop
710          */
711         pvinfo->hcall[0] = inst_lis | ((KVM_SC_MAGIC_R0 >> 16) & inst_imm_mask);
712         pvinfo->hcall[1] = inst_ori | (KVM_SC_MAGIC_R0 & inst_imm_mask);
713         pvinfo->hcall[2] = inst_sc;
714         pvinfo->hcall[3] = inst_nop;
715
716         return 0;
717 }
718
719 long kvm_arch_vm_ioctl(struct file *filp,
720                        unsigned int ioctl, unsigned long arg)
721 {
722         void __user *argp = (void __user *)arg;
723         long r;
724
725         switch (ioctl) {
726         case KVM_PPC_GET_PVINFO: {
727                 struct kvm_ppc_pvinfo pvinfo;
728                 memset(&pvinfo, 0, sizeof(pvinfo));
729                 r = kvm_vm_ioctl_get_pvinfo(&pvinfo);
730                 if (copy_to_user(argp, &pvinfo, sizeof(pvinfo))) {
731                         r = -EFAULT;
732                         goto out;
733                 }
734
735                 break;
736         }
737 #ifdef CONFIG_KVM_BOOK3S_64_HV
738         case KVM_CREATE_SPAPR_TCE: {
739                 struct kvm_create_spapr_tce create_tce;
740                 struct kvm *kvm = filp->private_data;
741
742                 r = -EFAULT;
743                 if (copy_from_user(&create_tce, argp, sizeof(create_tce)))
744                         goto out;
745                 r = kvm_vm_ioctl_create_spapr_tce(kvm, &create_tce);
746                 goto out;
747         }
748
749         case KVM_ALLOCATE_RMA: {
750                 struct kvm *kvm = filp->private_data;
751                 struct kvm_allocate_rma rma;
752
753                 r = kvm_vm_ioctl_allocate_rma(kvm, &rma);
754                 if (r >= 0 && copy_to_user(argp, &rma, sizeof(rma)))
755                         r = -EFAULT;
756                 break;
757         }
758 #endif /* CONFIG_KVM_BOOK3S_64_HV */
759
760         default:
761                 r = -ENOTTY;
762         }
763
764 out:
765         return r;
766 }
767
768 int kvm_arch_init(void *opaque)
769 {
770         return 0;
771 }
772
773 void kvm_arch_exit(void)
774 {
775 }